SmallMultiparameterProbe

CTD 48 | CTD 48 M OnlineandMemoryProbe

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Figure:Originalsize

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The CTD 48 M is a high quality, high accuracy 4 channel probe for ocea-nographic and limnologic measure-ment of conductivity, temperature, depth and one optional parameter in depth up to 6000 m.

SST´sCTD48Mrunsfromaninternalbatteryandrecordsdataatprogrammabletimeintervalsorpres-surestampsinanonvolatileFLASHmemorywithacapacityof8Mbytes.AstandardRS-232interfaceisusedforprogramminganddataextraction.ThesuppliedStandardDataAcqui-sitionSoftwarepackage“SST-SDA”forWin®95toWin7includesthehandlingoftheloggingprocessandthedisplayofonlineorrecordeddatawithasharedgraphicuserinterface.TheCTD48Mallowsthesimultane-ousmeasurementof4ofthefol-lowingparameters:pressure(depth),temperature,conductivity,pH,Redox(ORP),dissolvedoxygen,turbidity.

Recording modes• Continuousmode:eachdataset

isstored.• Timemode:datasetsarestored

onlyatprogrammableintervalswithseveralselectableschemes.

• Pressuremode:datasetsarestoredatprogrammabledepthstamps.

Morethan255castscanbestoredatprofilingandcontinuousmodeaslongastheFLASHmemoryorthebatterycapacityissufficient.Thestartofacastispossibleusingamagnet;theprobemustnotbecon-nectedtoacomputer.

Upto400.000CTDdatasetscanberecorded,theactualnumberdependsontheselectedstorageoptionsandthenumberofsensorsadaptedtotheprobe.

Theprobeisequippedwithapre-cisionmicroprocessor-controlled4channel20bit(reducedto16bit)analogtodigitalconverter.DataisavailableasRS-232signal(multi-conductorsea-cable)toaPC.TheprobecanbepoweredbybatteryorDC-powersupply(7to15Volt)whenusingRS-232output.

On demandEnvironmentaltestcertificatefortemperatureandvibrationaccordingtoGLspecificationfulfilled.

The CTD will be delivered in a compact, robust, and water resistant plastic case inclusing cables, connection plugs, instruction manual, and a software CD.

Sensors

Conductivity

Temperature

Pressure (depth)

pHAMT,Hamilton,

MettlerToledo,Schott;

H2Sresistantornon-H2Sresistant

Redox AMT,Mettler

Toledo;H2Sresistant

ornon-H2Sresistant

Seapoint Sensors

(e.g.TurbidityBulkhead,

ChlorophyllFluorometer*)

DOOxyguard

DOAMT,fast

500 m Probe

x

x

x

x

x

x

x

max.100m

2000 m Probe

x

x

x

x

x

x

x

max.100m

6000 m Probe

x

x

x

–

–

–

–

–

CTD 48 | CTD 48 M OnlineandMemoryProbe

* not possible for the memory version

Principle

7-pole-cell

Pt1004pole

piezo-resistive

combinedelectrode

combinedelectrode

90°scatterance

Clarkelectrode

Microsensor

Range

0–70mS/cm

–2–+36°C

variousranges:<6000dbar

2–10pH

±2V

0–750FTU

0–250%sat

0–200%sat

Accuracy

±0.003mS/cm

±0.002°C

±0.1%fullscale

±0.02pH

±10mV

±3%

±2%

Resolution

0.001mS/cm

0.001°C

0.002%fullscale

0.0002pH

1.0mV

0.1FTU

0.1%

0.1%

Responsetime ( 63 %)

150ms

150ms

150ms

1s

1s

100ms

3s(63%),

10s(98%)

<1s

Computerfordataacquisition

Cable drumuseableasmanualwinchRS-232andpowersupply12VDC

CTD 48 | CTD 48 M

RS-232

Multi-conductor cable

Distributor:Sea & Sun Marine Tech is member of

Sea & Sun Technology GmbHArndtstrasse 9–13 • 24610 Trappenkamp • GermanyTel: +49•4323•910 913 • Fax +49•4323•910 915e-mail@sea-sun-marine-tech.com www.sea-sun-marine-tech.com

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DimensionsØ (housing) 48 mmLength (housing) appr. 240 mmLength (overall) appr. 450 mm

MaterialHousing titaniumWeight (in air) appr. 1.5 kg

Standard models are:1. CTD with one additional parameter2. H2S-probe with P, T, pH

Electrical specificationspower 9–15VDCcurrentconsumption 30mAserialport RS232datatransmission 4–5CTDsets/sbattery LithiumC3,6Vor AlkalineC1,5Vcontinuousoperationtime(dependsonambienttemperature) Lithiumappr.450h Alkalineappr.150h

• titanium housing Ø 48 mm• depth range CTD 48 and CTD 48 M up to 6000 m, other depths ranges on request• 20 bit AD Converter• internal memory and/or FSK mode RS 232/485 output• internal battery• control LED• easy handling• low weight• calculation according to UNESCO formulas

CTD 48 | CTD 48 M OnlineandMemoryProbe

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